Quantum Internet Magic: 254 km of Unhackable Data on Existing Cables
German researchers have achieved a milestone by transmitting quantum communications across 150 miles of standard commercial fiber-optic lines—linking Frankfurt, Kehl, and Kirchfeld—without overhauling existing telecom infrastructure. This proof-of-principle used off-the-shelf components to send quantum keys over 254 km of deployed fiber, setting a new record for coherent quantum key distribution in real-world conditions. The breakthrough […]